/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.lyk.jsbridge.vo.toolbox;

import com.lyk.jsbridge.vo.NetworkResponse;
import com.lyk.jsbridge.vo.Request;
import com.lyk.jsbridge.vo.Response;
import com.lyk.jsbridge.vo.VolleyLog;

import java.io.UnsupportedEncodingException;


/**
 * A request for retrieving a T type response body at a given URL that also
 * optionally sends along a JSON body in the request specified.
 * 
 * @param <T>
 *            JSON type of response expected
 */
public abstract class JsonRequest<T> extends Request<T> {
	/** Charset for request. */
	private static final String PROTOCOL_CHARSET = "utf-8";

	/** Content type for request. */
	private static final String PROTOCOL_CONTENT_TYPE = String.format(
			"application/json; charset=%s", PROTOCOL_CHARSET);

	private final Response.Listener<T> mListener;
	private final String mRequestBody;

	/**
	 * Deprecated constructor for a JsonRequest which defaults to GET unless
	 * {@link #getPostBody()} or {@link #getPostParams()} is overridden (which
	 * defaults to POST).
	 * 
	 * @deprecated Use
	 *             {@link #JsonRequest(int, String, String, Listener, ErrorListener)}
	 *             .
	 */
	public JsonRequest(String url, String requestBody, Response.Listener<T> listener,
			Response.ErrorListener errorListener) {
		this(Method.DEPRECATED_GET_OR_POST, url, requestBody, listener,
				errorListener);
	}

	public JsonRequest(int method, String url, String requestBody,
					   Response.Listener<T> listener, Response.ErrorListener errorListener) {
		super(method, url, errorListener);
		mListener = listener;
		mRequestBody = requestBody;
	}

	@Override
	protected void deliverResponse(T response) {
		mListener.onResponse(response);
	}

	@Override
	abstract protected Response<T> parseNetworkResponse(NetworkResponse response);

	/**
	 * @deprecated Use {@link #getBodyContentType()}.
	 */
	@Override
	public String getPostBodyContentType() {
		return getBodyContentType();
	}

	/**
	 * @deprecated Use {@link #getBody()}.
	 */
	@Override
	public byte[] getPostBody() {
		return getBody();
	}

	@Override
	public String getBodyContentType() {
		return PROTOCOL_CONTENT_TYPE;
	}

	@Override
	public byte[] getBody() {
		try {
			return mRequestBody == null ? null : mRequestBody
					.getBytes(PROTOCOL_CHARSET);
		} catch (UnsupportedEncodingException uee) {
			VolleyLog
					.wtf("Unsupported Encoding while trying to get the bytes of %s using %s",
							mRequestBody, PROTOCOL_CHARSET);
			return null;
		}
	}
}
